Molars

Question 1

What shape is the occlusal outline from an occlusal view of mx 1st molars?

Answer 1

rhomboidal

Question 2

Which angles on max 1st molars are acute?

Answer 2

mesiofacial and distolingual

*rhomboidal shape

Question 3

which angles on max 1st molars are obtuse?

Answer 3

mesio-lingual and disto-facial

**rhomboidal shape

Question 4

what direction does the max 1st molar taper?

Answer 4

facial

Question 5

are the buccal or lingual embrasures larger?

Answer 5

buccal

Question 6

which root of the 1st mx molar is the largest?

Answer 6

palatal

Question 7

which root of the 1st mx molar is the smallest?

Answer 7

disto-buccal

*MB root needs rom for MB2 canal, so it needs to be bigger

Question 8

which tooth when viewed from the facial has the lingual root and facial groove lined up?

Answer 8

mx 1st molar

Question 9

When the mx 1st moalr has a 4th canal, which root is it typically located in?

Answer 9

mesio-buccal

Question 10

where are the 3 furcations of the mx 1st molar located?

Answer 10

mesial, buccal, distal

Question 11

which furcation is closest to the cervial line in mx 1st molars?

Answer 11

mesial

• M –> B –> D

Question 12

what landmark is the distal boundary of the mx 1st molar?

Answer 12

oblique ridge

*obtuse angles of the rhomboidal shape coincide with the direction of the ridge

Question 13

what angles connect the oblique ridge in the mx 1st molar?

Answer 13

ML and DB

Question 14

which cusp of the mx 1st molar occludes wit the central fossa of the mandibular molars?

Answer 14

ML

Question 15

which tooth has the greatest FL diameter?

Answer 15

mx 1st molar

*think of the cusp of carabelli

Question 16

Which tooth is the closest in size FL vs MD in MAX. POSTERIOR teeth?

Answer 16

mx 1st molar

Question 17

Which part of the mx 1st molar is longer? MD on the facial side, or MD on the lingual side?

Answer 17

mesio-distal on the facial side

Question 18

which cusp of mx 1st molar is the largest and longest?

Answer 18

mesio-lingual cusp

Question 19

which tooth is most likely to be forced into the maxillary sinus during extraction?

Answer 19

mx 1st molar

Question 20

Does the mx 1st or 2nd molar have a shorter disto-lingual groove?

Answer 20

mx 1st molar

Question 21

if the disto-lingual cusp is missing, which tooth can have 3 cusps and look like a heart?

Answer 21

mx 2nd molar

Question 22

which molar has roots that are less divergent and more distally inclined than the others?

Answer 22

mx 2nd molar

Question 23

what shape is the mx 2nd molar in a cross section at the cervical line?

Answer 23

triangular

Question 24

what tooth has a Y or dryopethicus groove pattern?

Answer 24

md 1st molar

Question 25

what is the occlusal outline of the md 1st molar?

Answer 25

pentagon

Question 26

Which cusp of md 1st molar is smallest?

Answer 26

distal cusp *MB > ML > DL > DB > D

Question 27

what cusp of the md 1st molar is the largest?

Answer 27

MF **MB > ML > DL > DB > D

Question 28

Which tooth has the LARGEST M-D dimension of ANY tooth?

Answer 28

Md 1st molar * it has the distal cusp * Longest M-D of All teeth, mandibulars, posteriors, and molars

Question 29

what tooth is the only mandibular one to be longer MD than FL

Answer 29

md 1st molar *Longest M-D of All teeth, mandibulars, posteriors, and molars

Question 30

which tooth is the only posterior tooth that is wider MD than FL?

Answer 30

md 1st molar *Longest M-D of All teeth, mandibulars, posteriors, and molars

Question 31

which tooth has the largest F-L dimension of any other mandibular tooth?

Answer 31

md 1st molar *mx 1st molar has largest FL of any tooth

Question 32

what tooth has the largest occlusal-cervical crown dimension than any other tooth?

Answer 32

md 1st molar

Question 33

When compared to the ascending ramus, where are the facial surfaces of the md 1st molar?

Answer 33

medial * think of an IA block * same with md 2nd molar

Question 34

how many facial cusps does the md 1st molar have?

Answer 34

3

Question 35

what is the deveopmental groove between the disto-buccal/facial and distal cusp on the md 1st molar called?

Answer 35

the disto-facial groove

Question 36

md 1st molar has how many roots and canals?

Answer 36

2 roots, 3 canals *2 in mesial root

Question 37

what tooth has the longest root of any other molar?

Answer 37

md 1st molar *mx canine root is longest of any rooth

Question 38

what tooth has the greatest root separation?

Answer 38

md 1st moalr

Question 39

what md 1st molar cusps occlude in the central fossa of the maxillary molars?

Answer 39

DB cusps

Question 40

what about md 1st molar accommodates working movements?

Answer 40

ideal position and height of lingual cusps

Question 41

how do you tell a right vs left md 2nd molar?

Answer 41

the FL on the mesial side is wider

Question 42

the crown of the md 2nd molar inclines in what direction?

Answer 42

mesial and lingual

Question 43

how many teeth does a mx 3rd molar occlude with?

Answer 43

1 *md centrals also only occlude with 1

Question 44

what molar most frequently has 3 cusps?

Answer 44

mx 3rd molar

Question 45

from an occlusal view, what shape is the mx 3rd molar?

Answer 45

heart

Question 46

what toot has the great variation in crown morphology?

Answer 46

md 3rd molars *then mx laterals

Question 47

what tooth has the greatest distal root inclination of any other tooth?

Answer 47

md 3rd molars

Question 48

what mandibular tooth has the shortest root of any other mandibular tooth?

Answer 48

md 3rd molars